(GH-532) Fix - Temp uses 8.3 Path

When determining the cache location and using the `TEMP` environment
variable, ensure that it is coming back as a Full Path and not as an
8.3 path. This happens on some systems when you simply call for the
Environment Variable. However `Path.GetTempPath()` provides a fully
qualified path instead of a shortened path. Use that instead.

src/chocolatey/infrastructure.app/builders/ConfigurationBuilder.cs

@@ -128,7 +128,7 @@ private static void set_machine_sources(ChocolateyConfiguration config, ConfigFi
         private static void set_config_items(ChocolateyConfiguration config, ConfigFileSettings configFileSettings, IFileSystem fileSystem)
         {
             var cacheLocation = set_config_item(ApplicationParameters.ConfigSettings.CacheLocation, configFileSettings, string.IsNullOrWhiteSpace(configFileSettings.CacheLocation) ? string.Empty : configFileSettings.CacheLocation, "Cache location if not TEMP folder.");
-            config.CacheLocation = !string.IsNullOrWhiteSpace(cacheLocation) ? cacheLocation : System.Environment.GetEnvironmentVariable("TEMP");
+          config.CacheLocation = !string.IsNullOrWhiteSpace(cacheLocation) ? cacheLocation : fileSystem.get_temp_path(); // System.Environment.GetEnvironmentVariable("TEMP");
             if (string.IsNullOrWhiteSpace(config.CacheLocation))
             {
                 config.CacheLocation = fileSystem.combine_paths(ApplicationParameters.InstallLocation, "temp");